Mold foe hollow tiles



Mar. 20, 1923.

J. L. LAMB.

Mom Foa' HoLLow mes.

2 SHEETS-SHEET I.

FILED NDV. 4,1922.

L rm

Patented Mar. 20, 1923.

O F F I C E JOHN L. LAMB, OF MIAMI, OKLAHOMA.

MOLD FOR HOLLOW TILES.

Application filed November 4, 1922.

To all @from t `may concern.'

Be it known that I, JOHN L. LAMB, a citi- @en of the United States,residing at Miami, 1n the county of Ottawa and State oi' Oklahoma, haveinvented a new and useful Mold lor Hollow Tiles, of which the following1s a specification. i

This invention relates to hollow tiles for drainage, sewers, and otherpurposes and to molds for making them.

The object of the invention is to provide a title of this characterwhich may be constructed to fit openings of various sizes and shapes.

Another object is to provide a tile of this charauftcr combiningsimplicity and ease of construction with the greatest possible utilityand which may be repaired with the least possible digging and joining ofparts, the use of which discloses with certainty to the party laying,When a complete job has been effected.

Another object is to provide a simple and etlicient form forconstructing circular pillars or posts.

lVith the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the inven tion herein disclosed may be made Within thescope of what is claimed without departing from the spirit of theinvention.

In the accompanying drawings z- Figure 1 represents a side elevationpartly in section of a mold used in forming a cylindrical post.

Figure 2 is a top plan View thereof.

Figure 3 is a transverse section taken on the line 3 3 of Fig. 1.

Fig. 4 is a side elevation partly in section of a cylindrical pillarconstructed in the mold shown in the above described figures.

Fig. 5 is an end elevation thereof.

Fig. 6 is an end elevation of a slightly different form of mold.

Fig. 7 is a top plan view With parts broken out and in section ofanother form of mold for constructing semi-cylindrical tiles.

Fig. 8 is a longitudinal section thereof taken on the line 8-8 of Fig.7.

Fig. 9 is a transverse section taken on the line 9-9 of Fig. 7.

Fig. 1() is a detail perspective view of a Serial No. 599,029.

tile constructed by means of the mold shown in Figs. 7 to 9, and

Fig. 11 is an end elevation` showing two of the tiles arranged to form ahollow conduit or block.

In l `igs. 1, 2 and 3 a forni 1 is shown for molding a hollow concretepillar or post such as that shown in Figs. -i and 5. This :form 1comprises an outer longitudinally split casing 2, the longitudinal edgesof which overlap and are provided With interengaging tongues 3 as shownclearly in Fig. 3.

This casing il is held in operative position by any suitable means inaddition to the intcrengaging tongues preferably by retaining bands Litand by a cap 5, the flange G ot' which lits over one end ot' the casingi2 as shown in Fig. 1, and thereby assists in preventing spreading ofthe casing. A smaller cap S is carried by the cap 5, beingr securedthereto by a bolt 7. This cap 8 has a flange 9 concentric ivith theiangc G but considerably wider and is designed to tit in a collapsiblecore 10 located in casing Qa and` non to be described.

The core 10 is composed of a longitudinally split tube ot resilientsheet metal with the longitudinal edges thereof overlappinc. said corehaving a tendency to contract and is normally held in expanded positionby the flange 9 or cap S inserted at one end and by a cylindrical member11 inserted in the other end. Then this core 10 is mounted in the casing2 it is spaced from the inner wall of' said casing a dista-ncecorresponding te thc thickness oi the Wall oit the hollow pillar or postto be formed and is retained in this position by the cap 8 carried bycap 5 and by spring clips or gripping fingers 12 which are carried bythe casing 2 and secured thereto in any suitable manner. These springlingers 12 are here shown having hooks 1? at their inner ends which areengaged with the uppermost band 4- which surround the casing The bodyportions 14.- oi these centering fingers are arranged flat :.xgainst theouter face of the casing .2 and are provided at their upper ends withhook-like bends 15 which lit over the edge ot the casing 2 and thenfolded again upon themselves as shown at 16 and extended inwardly andoutwardly to engage the core `10 and hold it centered, any number ofthese fingers may be employed. three being here shown.

The flange 9 ot' the end cap 8 and tubular member' ll are preferablyoiled on their outer faces to facilitate their insertion and removal sothat after the pillar or post has been molded these members may bereadily removed from the core l0 and thus permit said core to contractto facilitate its ree moval.

ln the use of this form, the parts being iu. the position shown in Fig.1` the concrete or cement is poured into the space between the outercasing 2 and the core l0 completely surrounding said core and fillingsaid space. After the poured cement hardens sufficiently, the mold orform is removed by withdrawing the cap which carries with it the innercap 8. The spring clamp or retaining banda l are then removed from thecasing 2 which permits said casing to expand and he easily` slipped offthe molded article.

The tubular member ll. is then drawn out of the core l0 which willpermit said core to collapse or contract and he easily removed leaving acylindrical post or pillar li' such as that shown in Fig. 4. The sidewalls of this pillar 1T maj,v be vari-ed in thickness as desired b vchanging the relative sizes of the casing Q and the core l0 as will beunder stood.

In the form shown in Fig. G. the core l0 is exactly like that describedabove. the casing 2 being similar to the easing 2, except that it ismade rectangulai` in cross section instead of circular.

ln Figs. 7. 8 and 9 another mold Q0 is shown designed to produce thetiles 30. one of which is shown in detail in Fig. lll. and in Fig. 1l.ytwo of them are arranged in superposed position to provide a hollowblock or conduit having a bore extending therethrough which iscylindrical in form.

The form employed for making these tiles comprises two side boards 2land QQ of a width corresponding to the thickness of the tile 30 to beproduced. These boards 2l and are connected at their opposed ents; byrods 23 and 24 which are removably mounted in said boards. Arrangedbetween the boards at longitudinally spaced intervals are a plurality oftransversely arranged par titions 25 preferably constructed ofgalvanized iron or the like and are spaced apart a distancecorresponding to the length of the tiles to he molded. These partitionsare held in operative position by any suitable means` cotter pins 26being here shown en tended transversely through the boards 2l and 22with their fureations straddling the partitions as is shown clearly inFig. 7.

Any desired number of these partitions Q5 may be provided, according tothe sizes of the mold. five being here shown and which operate toseparate the individual tiles formed in the mold. These partitions havetheir upper edges cut out as shown in Figs. 7 and S, said cut portionsbeing of any desired configuration according to the shape of the innerfaces of the tiles to be molded7 said cut outs being.;l here shownsemi-circular.

The side boards 21 and 22 are provided near their opposite ends in theirupper edges with seats 2 here shown cmi-circular in form and which aredesigned to support cores :28 here shown semi-circular in form withtheir flat faces arranged flush with the upper edges of the board.

A. longitudinally disposed coro i251 is designed to be supported in theout out upper edges of tho partitions 25, said core being similar incross sectional contour to the cores 2Q with its flat upper facearranged flush with the upper vfaces of said cores and with the upperedges of the boards.

In the use of the mold Q0, the parts being removable as shown in Fig. 7,the cement is poured around the cores 28 and 29 between them and theside boards 21 and 22 and be tween the transverse partitions 25, andcompletely fills the spaces surrounding these parts as is shown clearlyin Fig. 8. After the poured cement hardens, the cores 28 and 29 arelifted out and the boards 2l and 22 separated by ren'ioving the rods and24 and withdrawing the cotter pins Q6. After these boards have beenremoved` the tiles formed in the compartments between the partitions 25may be readily removed and may be used for any purpose desired.

1vlVhen a conduit is to be formed. two of the tiles 3() are snperposcdwith their hollow portions facing each other as shown in Fig. il, thusforming a tile with a circular opening 31 extending therethrough. Inlaying tiles of this character for use in this way, the lower membersare first placed in position and earth tamped around them up to a pointsubstantially flush with their upper faces. The cooperating tiles arethen placed on the tiles so embedded as shown in Fig. 1l and are securedthereto by means of mortar arranged in the joints between the supcrposedtiles, a swab being preferably used to prevent the mortar filling in thebore in the. tiles. It understood of course. that as the tiles are laid,the swab is moved longitudinally so as to clean out any mortar which maydrop into the interior of the tile.

From the above description it will be readilyv seen that the blocks ortiles constructed herein shown and described are eonilniratively lightand may be easily laid at any level although the weight thereof may hevaried .in construction b v increasing or diminishing the thickness ofthe walls. Y

While these tiles are. primarily intended to be used as drain tiles,obviously concrete forms may be so constructed as to produce a vbuildingblock by merely extending or lengthening the edges thereof and theopening inside forms an air chamber in each layer of blocks.

Various changes in the form, shape, proportion and other minor detailsof construction may be made without departing from the principle orsacrificing any of the advantages of the claimed inventlon.

I Claim 2- l. ln a mold of the class described, longitudinally splitresilient metal inner and outer casings of di'erent diameters, the edgesof the slit of each easing being arranged in lapping relation, wherebythe inner casing is normally contractable and the outer casing normallyeXpansible, a cap having a i'iange to lit around the outer casing at oneend thereof, a similar cap mounted on and secured to the inner face ofsaid first mentioned cap and adapted to fit in said inner casing forminga reinforcement and spreader' therefor, a tubular member for insertionin the other end of said casing, and retaining bands arranged around theouter casing.

2. In a mold of the class described, longitudinally split resilientmetal inner and outer casings of different sizes, the edges of the splitbeing arranged in lapping relation whereby the inner casing is normallycontractable and the outer casing normally eX- pansible, a cap having aflange t0 fit around the outer casing at one end thereof, a tubularmember carried by the inner face of said p to fit Within the innereasing to hold it against collapse, retaining bands arranged around theouter casing, a tubular member for insertion in the other end of saidinner easing, and centering fingers carried by the open end of the outercasing to engage the adjacent end of the inner casing to hold said endcentered relatively' to the outer easing, said fingers having hooks, attheir inner ends, the body portions of the lingers being arranged flatagainst the outer face of the easing and provlded at their upper endswith hook-like bends to fit over the edge of the casing and then foldedagain upon themselves and extended inwardly and outwardly to engage thecore and hold it @ent/ered.

In testimony that I claim the foregoing as my own, I have hereto aiixedmy signature in the presence of two Witnesses.

JOHN L. LAMB. lVitnesses:

W. R. TIDWELL, E. L. NEFF.

